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(No Model.)

G. H. CORLISS.

GOVERNOR REGULATION. N0. 333,834. Patented Jan. 5, 1886.

N. PETERS. Phulo-Ldhcgmphur. Wnshinglnn. u c.

.llnrrnn STATES PATENT OFFICE.

GEORGE'H. GORLISS, OF PROVIDENCE, RHODE ISLAND.

GOVERNOR-REGULATION.

SPECIFICATION forming part of Letters Patent No. 333,834, dated January 5, 1886.

Application filed June 13, 1885. Serial No.168,595. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE E. CORLISS, a

I citizen of the United States, residing in the alogous motor.

tant point, near the cupola, where the blast is used. It is frequently required to change the 3 force of the blast according as the iron is found to come down or assume the melted condriving the blower.

: point dition more or less rapidly. One way of attaining this is to blow always with an excess of force and to suppress it by a valve near the furnace. My invention is more economical.

I .drive the blower with greater or less velocity by varying the number of revolutions per minute of the engine at will. It will be understood that there is a separate engine for In large works the furnace is frequently at a distance of several hundred feet from the blower. I have devised convenient means for controlling the velocity of the engine with great nicety from any desired, usually a point near the furnace. The governor is driven by a frictionwheel engaging on a face-wheel similar to that set forth in the patent to me dated August 8, 1882, No. 262,209, but instead of changing the position of the friction-wheel relativelyto the face-Wheel automatically I change it at the will of the attendant,the force being communicated through the pressure of an inelastic fluid with a convenient device at one end for varying the pressure at will, and a device at the other end for utilizing such changes of pressure to change the position of the frictionwheel. I have in my experiments used a hollow bulb of vulcanized india-rubber at each end of the pipe,with a device for compressing one by a screw and for receiving the changes of pressure from the other by a weight supported on or against the flexible bulb connected to the governor mechanism.

changes of pressure.

The accompanying drawings form a part of this specification, and represent what I consider the best means of carrying out the inven- 1 tion.

Figure 1 is an elevation of the governor. Fig. 2 is a vertical section of the device which transmits the changes of pressure to the mechanism in Fig. 1. Fig. 3 is a vertical section showing the device operated by the attendant at a distant point to produce the desired Similarletters of reference indicate corresponding parts in all the figures where they occur.

A is a fixed frame-work,of cast-iron or other suitable material, certain parts being designated, when necessary, by additional marks,

as A.

B is the main shaft of the engine, and B is a pulley carried thereon.

D is a shaft mounted in fixed bearings A A with liberty to be shifted endwise therein to a considerable extent.

D is a pulley which receives motion by means of abelt, C, from the main shaft.

D is a friction pulley having a narrow bead, d, of leather or analogous frictional material around its periphery.

E is the upright shaft of the governor. On its lower end is fixed a horizontal face-wheel, E, of considerable diameter, which rests on the rim d of the pulley D and receives a rotatory motion therefrom. equipped with arms F, carrying fly-balls F, connected by links G to a sleeve, H, which; while it revolves with the shaft E, rises and sinks under the influence of the gravity and centrifugal force of the balls, as is well under-;,

tween collars on the shaft D. The upper arm of K engages by a rod, L, with a plunger, L, on which is mounted achangeable weight, L. The plunger L is arranged to play easily up The shaft E is- The lower arm of K engages be= IOO and down in a sufficient orifice in the top of a fixed casing, A properly formed in its interior and supporting a hollow flexible bulb, M of vulcanized rubber. This bulb is connected by a pipe, M, only part of which is represented, with a corresponding bulb, M, similarly supported in the interior of a fixed casing, A". Sufficient fluid is introduced to fill the pipe M and to partially fill the bulbs M M", and the hole is hermetically closed. The casing A differs from A in the fact that its top is screw-threaded and receivesa screw, 0, operated by a crank, O, which as it is turned raises and lowers a connected plunger, N, resting on the bulb M and controlling its capacity. Vhen it is desired to blow harder so as to melt faster, the attendant turns the crank O to depress the screw 0 and plunger N. This forces fluid out of the bulb M through the pipe M into the bulb M. This raises the plunger L with its weight L and rod L, and, acting through the bell-crank K, moves shaft D to the right. This shifts the friction-rim d farther out from the axis of the face-wheel E, with the effect to run the governor slower and allow the balls F to sink, which operation shifts the lever I, and, changing the point of cutoff to give the engine more steam, quickens the engine until it runs with sufficient velocity to retain the governor-balls F at the proper level under all conditions. When, on the contrary, the furnace is melting iron too fast, and it is desired to reduce the blowing, the attendant turns the crank O to raise the plunger N. This,

by reducing the pressure on the bulb M,

allows the plunger L to'sink by its own weight and that of its attachments. This turns the lever K in the direction to shift D to the left. This has the effect contrary to the change before de scribed-that is to say, by shifting the beam ing of the friction-rim d nearer to the center of the face-wheel E, the engine turning the shaft D at the same rate as before, gives the fly-balls F a higher velocity, and in obedience to the increased centrifugal force they rise and change the point of cutoff to reduce the quantity of steam admitted to the engine. The governor thenceforward regulates as before, except that it holds the engine to the new and reduced velocity.

The apparatus allows the regulation to be adjusted with great nicety and with absolute reliability. The screw 0 holds the parts in any position in which they may be left.

Modifications may be made in the forms and proportions of the details, without departing from the principle or sacrificing the advantages of the invention.

The lever I and its attached rod K,or equivalent moving parts operated by the governor, may change the position of the throttle-valve instead of changing the position of cut-off.

The bulb M may be placed in a horizontal position and act directly on the end of the shaft I) to give it endwise motion in one direction, motion in the opposite direction being secured by a weight acting against the opposite end of the shaft.

The pipe M may be shortened or lengthened within wide limits.

The invention may be used to regulate engines for other purposes than blowing, as for pumping water at variable rates to considerable distances.

I claim as my invention- 1. In combination with a governor, and with means for changing the velocity ratio thereof, as the face-wheel E, friction-rim d, with liberty to shift the latter endwise, the bulb or vessel A plunger L, connection L, for actuating by the changes of pressure in a fluid, and the pipe M and bulb or vessel M, and means, as N O O, for compressing and holding compressed to various degrees at a. distant point, all arranged for joint operation substantially as herein specified. V

2. In combination with a governor, and with means for changing its velocity ratio, a constant force. as weight If, acting to compress the bulb or vessel A connected pipe M, bulb or vessel M, and means, as N O O, for increasing and relaxing the pressure on the latter at a distant point adapted to allow a single pipe and compressing meansto adjust the speed of the governorin both directions, substantially as herein specified.

In testimony whereof I have hereunto set my hand, at Providence, Rhode Island, this 2d day of June, 1885, in the'presence of two subscribi'ng'witnesses.

GEORGE H. OORLISS. 

